// ==本JS是加载Lodop插件及CLodop服务的综合示例，可直接使用，建议看懂后融进自己页面程序==

let CreatedOKLodopObject, CLodopIsLocal, CLodopJsState

// ==判断是否需要CLodop(那些不支持插件的浏览器):==
function needCLodop () {
    try {
        let ua = navigator.userAgent
        if (ua.match(/Windows\sPhone/i)) { return true }
        if (ua.match(/iPhone|iPod|iPad/i)) { return true }
        if (ua.match(/Android/i)) { return true }
        if (ua.match(/Edge\D?\d+/i)) { return true }

        let verTrident = ua.match(/Trident\D?\d+/i)
        let verIE = ua.match(/MSIE\D?\d+/i)
        let verOPR = ua.match(/OPR\D?\d+/i)
        let verFF = ua.match(/Firefox\D?\d+/i)
        let x64 = ua.match(/x64/i)
        if ((!verTrident) && (!verIE) && (x64)) { return true } else if (verFF) {
            verFF = verFF[0].match(/\d+/)
            if ((verFF[0] >= 41) || (x64)) { return true }
        } else if (verOPR) {
            verOPR = verOPR[0].match(/\d+/)
            if (verOPR[0] >= 32) { return true }
        } else if ((!verTrident) && (!verIE)) {
            let verChrome = ua.match(/Chrome\D?\d+/i)
            if (verChrome) {
                verChrome = verChrome[0].match(/\d+/)
                if (verChrome[0] >= 41) { return true }
            }
        }
        return false
    } catch (err) {
        return true
    }
}

// ==加载引用CLodop的主JS,用双端口8000和18000(以防其中一个被占):==
function loadCLodop () {
    if (CLodopJsState == 'loading' || CLodopJsState == 'complete') return
    CLodopJsState = 'loading'
    let head = document.head || document.getElementsByTagName('head')[0] || document.documentElement
    let JS1 = document.createElement('script')
    let JS2 = document.createElement('script')
    JS1.src = 'http://localhost:8000/CLodopfuncs.js?priority=1'
    JS2.src = 'http://localhost:18000/CLodopfuncs.js'
    JS1.onload = JS2.onload = function () { CLodopJsState = 'complete' }
    JS1.onerror = JS2.onerror = function (evt) { CLodopJsState = 'complete' }
    head.insertBefore(JS1, head.firstChild)
    head.insertBefore(JS2, head.firstChild)
    CLodopIsLocal = !!((JS1.src + JS2.src).match(/\/\/localho|\/\/127.0.0./i))
}

if (needCLodop()) { loadCLodop() }// 加载

// ==获取LODOP对象主过程,判断是否安装、需否升级:==
function getLodop (oOBJECT, oEMBED) {
    let strHtmInstall = "<br><font color='#FF00FF'>打印控件未安装!点击这里<a href='install_lodop32.exe' target='_self'>执行安装</a>,安装后请刷新页面或重新进入。</font>"
    let strHtmUpdate = "<br><font color='#FF00FF'>打印控件需要升级!点击这里<a href='install_lodop32.exe' target='_self'>执行升级</a>,升级后请重新进入。</font>"
    let strHtm64_Install = "<br><font color='#FF00FF'>打印控件未安装!点击这里<a href='install_lodop64.exe' target='_self'>执行安装</a>,安装后请刷新页面或重新进入。</font>"
    let strHtm64_Update = "<br><font color='#FF00FF'>打印控件需要升级!点击这里<a href='install_lodop64.exe' target='_self'>执行升级</a>,升级后请重新进入。</font>"
    let strHtmFireFox = "<br><br><font color='#FF00FF'>（注意：如曾安装过Lodop旧版附件npActiveXPLugin,请在【工具】->【附加组件】->【扩展】中先卸它）</font>"
    let strHtmChrome = "<br><br><font color='#FF00FF'>(如果此前正常，仅因浏览器升级或重安装而出问题，需重新执行以上安装）</font>"
    let strCLodopInstall_1 = "<br><font color='#FF00FF'>Web打印服务CLodop未安装启动，点击这里<a href='CLodop_Setup_for_Win32NT.exe' target='_self'>下载执行安装</a>"
    let strCLodopInstall_2 = "<br>（若此前已安装过，可<a href='CLodop.protocol:setup' target='_self'>点这里直接再次启动</a>）"
    let strCLodopInstall_3 = '，成功后请刷新本页面。</font>'
    let strCLodopUpdate = "<br><font color='#FF00FF'>Web打印服务CLodop需升级!点击这里<a href='CLodop_Setup_for_Win32NT.exe' target='_self'>执行升级</a>,升级后请刷新页面。</font>"
    let LODOP
    try {
        let ua = navigator.userAgent
        let isIE = !!(ua.match(/MSIE/i)) || !!(ua.match(/Trident/i))
        if (needCLodop()) {
            try {
                LODOP = getCLodop()
            } catch (err) {}
            if (!LODOP && CLodopJsState !== 'complete') {
                if (CLodopJsState == 'loading') alert('网页还没下载完毕，请稍等一下再操作.'); else alert('没有加载CLodop的主js，请先调用loadCLodop过程.')
                return
            }
            if (!LODOP) {
                document.body.innerHTML = strCLodopInstall_1 + (CLodopIsLocal ? strCLodopInstall_2 : '') + strCLodopInstall_3 + document.body.innerHTML
                return
            } else {
                if (CLODOP.CVERSION < '4.1.0.4') {
                    document.body.innerHTML = strCLodopUpdate + document.body.innerHTML
                }
                if (oEMBED && oEMBED.parentNode) { oEMBED.parentNode.removeChild(oEMBED) } // 清理旧版无效元素
                if (oOBJECT && oOBJECT.parentNode) { oOBJECT.parentNode.removeChild(oOBJECT) }
            }
        } else {
            let is64IE = isIE && !!(ua.match(/x64/i))
            // ==如果页面有Lodop就直接使用,否则新建:==
            if (oOBJECT || oEMBED) {
                if (isIE) {
                    LODOP = oOBJECT
                } else {
                    LODOP = oEMBED
                }
            } else if (!CreatedOKLodopObject) {
                LODOP = document.createElement('object')
                LODOP.setAttribute('width', 0)
                LODOP.setAttribute('height', 0)
                LODOP.setAttribute('style', 'position:absolute;left:0px;top:-100px;width:0px;height:0px;')
                if (isIE) {
                    LODOP.setAttribute('classid', 'clsid:2105C259-1E0C-4534-8141-A753534CB4CA')
                } else {
                    LODOP.setAttribute('type', 'application/x-print-lodop')
                }
                document.documentElement.appendChild(LODOP)
                CreatedOKLodopObject = LODOP
            } else {
                LODOP = CreatedOKLodopObject
            }
            // ==Lodop插件未安装时提示下载地址:==
            if ((!LODOP) || (!LODOP.VERSION)) {
                if (ua.indexOf('Chrome') >= 0) {
                    document.body.innerHTML = strHtmChrome + document.body.innerHTML
                }
                if (ua.indexOf('Firefox') >= 0) {
                    document.body.innerHTML = strHtmFireFox + document.body.innerHTML
                }
                document.body.innerHTML = (is64IE ? strHtm64_Install : strHtmInstall) + document.body.innerHTML
                return LODOP
            }
        }
        if (LODOP.VERSION < '6.2.2.6') {
            if (!needCLodop()) {
                document.body.innerHTML = (is64IE ? strHtm64_Update : strHtmUpdate) + document.body.innerHTML
            }
        }
        return LODOP
    } catch (err) {
        alert('getLodop出错:' + err)
    }
}

export default {
    getLodop: getLodop
}
